[ 7/6/20 ]
We should be able to find ways to eliminate the risks to life from our own genetics, but that doesn’t do anything about all the other risks to life.
So elimination of the loss of function and increased risk of death simply due to aging is entirely possible; but that is not the same thing as living forever; and it would mean most people living a very long time in young looking and healthy bodies. If the risk profile from other causes improved reasonably then the average age at death would likely be around 5,000 years, with some few living much longer.
And some people have rather high tolerance for risk, so some reasonable fraction of people would still tend to live relatively short and very interesting lives.